Survivability modeling and analysis on 3D mobile ad-hoc networks

Most existing work on survivability in mobile ad-hoc networks(MANETs) focuses on two dimensional(2D) networks.However,many real applications run in three dimensional(3D) networks,e.g.,climate and ocean monitoring,and air defense systems.The impact on network survivability due to node behaviors was presented,and a quantitative analysis method on survivability was developed in 3D MANETs by modeling node behaviors and analyzing 3D network connectivity.Node behaviors were modeled by using a semi-Markov process.The node minimum degree of 3D MANETs was discussed.An effective approach to derive the survivability of k-connected networks was proposed through analyzing the connectivity of 3D MANETs caused by node misbehaviors,based on the model of node isolation.The quantitative analysis of node misbehaviors on the survivability in 3D MANETs is obtained through mathematical description,and the effectiveness and rationality of the proposed approach are verified through numerical analysis.The analytical results show that the effect from black and gray attack on network survivability is much severer than other misbehaviors.

面向未来的陆海空天融合通信网络架构

为了实现全球化的无缝网络覆盖,陆、海、空、天四位一体化融合通信已成为未来6G通信的发展趋势。对陆海空天一体化通信的网络架构及对应的关键技术进行综合分析与设计,并进行一项平流层通信试验案例分析。首先,简要回顾陆海空天融合通信的的发展背景;其次,详细讨论陆海空天融合通信系统的三项关键技术:3D网络建模、频率规划以及移动性管理,特别地,强调一种基于Binomial-Delaunay四面体的新型网络模型;基于该模型,进一步讨论了频率规划方案和节点综合移动模型;然后,扼要讨论3D网络中的无人机信道建模、动态频谱资源共享、干扰管理和基于AI的网络设计等四项关键技术;最后,作为空间网络架构演进中的一环,提出一种分层、异构式融合通信网络架构,并展示一个近期完成的平流层通信试验。